These copybooks were hand written by William Darlington, a nineteenth century collector of American history, in 1839. The volumes contain records about Fort Pitt, business transactions from 1752 to 1782, a list of names of some inhabitants at the fort, and some unrelated notes about Darlington's observations of birds in Allegheny County, Pennsylvania. Digital reproductions of the collection are available electronically by following the respective "Digitized Folder Contents" links within the finding aid.